Pumping system with circulating mechanism of bubble gas

ABSTRACT

This specification discloses a pumping system with circulating mechanism of bubble and gas in which the pump room at its upper portion is provided with a check valve which at its upper end is connected to a guide sleeve which at its upper end is coupled through a valve with a conduit connected to an upper portion of the pump pipe provided at its lower end with an outlet valve so that a divided flow which is sufficiently small as not to draw up the slurry is formed.

I United States Patent 1 1 1111 3,762,838

Sato 1 Oct. 2, 1973 [54] PUMPING SYSTEM WITH CIRCULATING 783,990 2/1905 Bewsher 417/502 MECHANISM OF BUBBLE GAS 2,118,234 5/1938 Rupp 417/435 3,043,499 7/1962 Knobloch et a1. 417/536 [76] Inven or: Ry 3-chome E 3,612,727 10 1971 Drake 417/388 Shibuya-ku, Tokyo, Japan [22] Flled: Sept' 1971 Primary Examiner-William l. Freeh [21] Appl. No.: 182,647 A!t0rneylrvin S. Thompson et a1.

Related U.S. Application Data 7 [63] Continuation of Scr. No. 863,556, Oct. 3, 1969,

abandoned. 57 ABSTRACT [30] Foreign Application Priority Dam This specification discloses a pumping system with cir- Oct. 8, 1968 Japan 43/72850 culating mechanism of bubble and gas in which the pump room at its upper portion is provided with a [52] US. Cl. 417/395 check valve which at its upper end is connected to a [51] Int. Cl F04) 43/06 guide sleeve which at its upper end iS COLlp|d through [58] Field Of Search 417/385, 388, 435, a valve with a conduit connected to an upper portion 567 of the pump pipe provided at its lower end with an outlet valve so that a divided flow which is sufficiently [56] References Cited small as not to draw up the slurry is formed.

UNlTED STATES PATENTS 2,291,889 8/1942 Evans et a1. 417/567 2 Claims, 1 Drawing Figure PATENTED OCT 2 I975 FIG] INVENTOR PUMPING SYSTEM WITH CIRCULATING MECHANISM OF BUBBLE GAS This is a continuation application of application Ser. No. 863,556, filed Oct. 3, 1969, now abandoned.

BACKGROUND OF THE INVENTION This invention relates to a novel pump with circulating mechanism of bubble and gas for the liquid containing slurry.

In the pumping operation of the liquid containing sedimentary slurry with agitation or of the liquid which is likely to generate gas, the gas or bubble is entered into the pump room so that the performance of the pump is considerably deteriorated. On the other hand, in the pump to be used for the liquid containing precipitatable slurry, it is necessary to reduce a distance between inlet valve and outlet valve as short as possible while to minimize a sectional area of the passage way of the liquid in order to secure a flow velocity of liquid greater than precipitation rate of slurry.

In the conventional pump, the pump room is usually of large size so that a distance between the inlet valve and the outlet valve becomes inevitably great since they are arranged on the upper and lower portions of the pump room respectively.

To improve the above disadvantages, it has been contrived to interconnect a chamber formed between the inlet valve and the outlet valve with the pump room by a pipe having such height that the slurry does not rise and enter into the pump room.

However, in the pumping operation of the liquid containing slurry of small size, it is difficult to prevent the pump room from entrance of the partial slurry thereinto despite of the presence of the pipe having such height that the slurry does not rise and enter into the pumping chamber. Accordingly, the poppet valve on sliding upwardly and downwardly along the passage way of the liquid catches the slurry contained in the liquid to be discharged together with the gas so that the pump does not run accurately or is stopped.

Moreover, since the liquid with gas are exhausted outside the pump through the pipe, the pump is not available to the highly corrosive liquid, explosive and inflammable liquid of high volatility, poisonous liquid and the expensive liquid.

SUMMARY OF THE INVENTION Generally, therefore, it is an object of the present invention to obviate the above and other disadvantages and difficulties and to provide a novel pump for liquid containing slurry which has certain structural and functional features of advantages over the similar pump of the prior art and is economic in manufacture and simple in construction.

A principal object of the invention is to provide a new pump in which the pump room at its upper portion is provided with a check valve which at its upper end is connected to a guide sleeve which at its upper end is coupled through a valve with a conduit connected to an upper portion of the pump pipe provided at its lower end with an outlet valve so that a divided flow which is sufficiently small as not to draw up the slurry is formed, which enables to positively exhaust the bubble and gas produced during the pumping operation and stay at the upper portion of the pump room without any hindrance to the operation of pump.

Other objects of the invention will in part be obvious and will in part appear hereinafter.

In brief the pump embodying the invention is characterized in that the pump room at its lower portion is coupled with a pipe having such length that slurry does not rise from the chamber formed between the inlet valve and the outlet valve and at its upper portion with a check valve, that the check valve at its other end is connected to a guide sleeve which at its other end is communicated through a valve with a conduit, that the conduit at its other end is further connected to the pump pipe of the outlet side one end of which being connected to the outlet valve.

For a fuller understanding of the nature and object of the invention a reference should be had to the following detailed description taken in connection with the accompanying drawing, by way of a non-limitative example, a preferred embodiment of the invention.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a sectional view of the diaphragm pump according to the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT In FIG. 1, the diaphragm chamber 1 is communicated through the communicating pores 2 with the pump room 3 which at its upper portion 4 is provided with the check valve 5 of the ball valve type which at its upper end is coupled with the guide sleeve 6. The opposite end of the guide sleeve 6 is connected through the valve 7 to the conduit 8 which is further connected to the pump pipe 1 l of the outlet side coupled at its lower end with the outlet valve 9. It will be appreciated that the divided flow thus formed must be the sufficiently small one as not to draw up slurry.

Under the outlet valve 9 is provided the inlet valve 10 symmetrically which is coupled with the ,pump pipe 12 of the inlet side. Between the inlet valve 10 and the outlet valve 9 is formed with the space 13 which is desired to be as short as possible.

The pump room 3 and the space 13 are communicated together by the pipe 14 having such height or length that slurry does not rise and enter into the pump room 3. The reference numeral 15 stands for pump plunger, 16 plunger room, 17 communication pores for communicating the plunger 15 with the diaphragm chamber 1 and 18 represents the diaphragm.

By the actuation of the diaphragm 18 to the pump room 3, the check valve 5 is opened so that the bubble with gas residing at the upper portion of the pump room 3 is exhausted in the form of gas alone or together with some liquid into the pump pipe 11 through the check valve 5, guide sleeve 6, valve 7 and the conduit 8. By the subsequent actuation of the diaphragm 18 to the plunger room 16, the check valve 5 is closed without any hindrance to the operation of the pump. Moreover, the check valve to be used in the present invention is preferably of the two stage ball valve as shown in the accompanying drawing so that the check valve always runs properly even if one of the ball valve does not work due to the clogging trouble by slurry.

In the pumping operation of the liquid containing slurry, the bubble with gas residing at the upper portion of the pump room 3 is discharged in the form of gas alone or together with the liquid into the pump pipe 11 in such a way as illustrated above so that bubble and gas are positively removed without any adherence and residence or deposition of slurry within the check valve 5, the guide sleeve 6, the valve 7, or in the conduit 8. Moreover, by controlling the flow rate of the liquid with the valve 7, the divided flow may be adjusted in accordance with the various conditions such as nature of liquid, content of bubble and gas etc. so that the pump always runs accurately. Furthermore, since the stagnant gas alone or together with some liquid are circulated through the pump pipe, there is no dangerous and uneconomical troubles.

While a preferred embodiment of the invention has been illustrated by way of example in the drawing and particularly described, it will be understood that modifications may be made in the constructions and that the invention is no way limited to the embodiment shown.

For example, while the invention has been described as relating to the diaphragm pump, it would not differ from the present invention to make use of it in connection with the other available pumps.

What is claimed is:

l. A pumping system with gas bleed, comprising a pump having a pump chamber, an upright pump delivery pipe having an outlet section and having below said outlet section a pair of spaced nonreturn valves, an inlet pipe extending from between said outlet valves to said pump chamber, said inlet pipe having a horizontal screw-threaded end that screw-threadedly engages in and cooperates with a coupling member in which said nonreturn valves are closely spaced on opposite sides of a horizontal passageway in line with said horizontal end of said inlet pipe, said threaded connection and said coupling member defining therebetween a small chamber in which the valves closest to the inlet pipe operate, said pump chamber having an upright side wall thereof movable into and out of the chamber to pump liquid, a conduit extending upwardly from the top wall of the pump chamber to said outlet section of said delivery pipe, a nonreturn valve in said conduit, and an adjustable valve in said conduit for opening and closing said conduit thereby to regulate the flow of fluid through said conduit to said outlet section.

2. A pumping system as claimed in claim 1, said spaced nonreturn valves having housings that are spaced apart a distance about equal to the diameter of said passageway. 

1. A pumping system with gas bleed, comprising a pump having a pump chamber, an upright pump delivery pipe having an outlet section and having below said outlet section a pair of spaced nonreturn valves, an inlet pipe extending from between said outlet valves to said pump chamber, said inlet pipe having a horizontal screw-threaded end that screw-threadedly engages in and cooperates with a coupling member in which said nonreturn valves are closely spaced on opposite sides of a horizontal passageway in line with said horizontal end of said inlet pipe, said threaded connection and said coupling member defining therebetween a small chamber in which the valves closest to the inlet pipe operate, said pump chamber having an upright side wall thereof movable into and out of the chamber to pump liquid, a conduit extending upwardly from the top wall of the pump chamber to said outlet section of said delivery pipe, a nonreturn valve in said conduit, and an adjustable valve in said conduit for opening and closing said conduit thereby to regulate the flow of fluid through said conduit to said outlet section.
 2. A pumping system as claimed in claim 1, said spaced nonreturn valves having housings that are spaced apart a distance about equal to the diameter of said passageway. 